#include<stdio.h>
#include<string.h>
#include<unistd.h>

int main()
{
   
  fprintf(stdout,"C: hello fprintf \n");
  printf("C: hello printf\n");
  fputs("C: hello fputs\n",stdout);
  const char* str="system call: hello write\n";
  write(1,str,strlen(str));

  fork();
  return 0;
}
